The system has successfully overcome the core contradiction between the intermittent and fluctuating nature of wind and solar power generation and the continuous, stable production requirements of coal chemical hydrogen production. By establishing a multi-timescale regulation mechanism, it achieves precise smoothing of fluctuations in renewable energy output and flexible adaptation of the hydrogen production load, ensuring the continuity of the hydrogen production process with a high proportion of new energy integration. Utilizing hardware such as laser wind measurement radar and all-sky imagers combined with machine learning technology, it enables second-level forecasting of wind and solar power with an accuracy rate exceeding 95%. Simultaneously, a deep regulation mechanism for large-capacity electrolyzers within new energy grid-connected hydrogen production systems has been established, resolving key technical challenges such as the flexible start-stop and rapid load response of electrolyzers. This has led to the first sustained and stable operation of a large-capacity electrolyzer in China's chemical industry, while also tackling the issues of instability in hydrogen production regulation and hydrogen-to-carbon ratio control. By developing an advanced process control system for hydrogen production and an advanced control system for the hydrogen-to-carbon ratio (APC), integrated operation and precise management of the entire hydrogen production and methanol synthesis process are achieved, significantly enhancing the operational reliability of the facility. As the core control system for China's first green hydrogen coupled with coal chemical demonstration project—the Datang Duolun 150,000 kW wind-solar hydrogen production integration project—this system was commissioned in April 2025 alongside the main project and is currently operating stably.
This unit represents the first application in China of a million-kilowatt-class, highly efficient, flexible, and ultra-large-flow double-extraction cogeneration unit. Designed with a pure condensing operational power supply coal consumption of 278.5 grams per kilowatt-hour, it reduces consumption by 23 grams per kilowatt-hour compared to conventional ultra-supercritical air-cooled units, saving approximately 115,000 tons of standard coal annually and reducing carbon emissions by 30.59 tons. A single unit can provide a maximum industrial steam extraction of 600 tons per hour and heating steam extraction of 1,600 tons per hour, exploring an effective systemic solution for ultra-double-extraction cogeneration in 1000MW-class ultra-supercritical units. It holds significant demonstrative value for how industrial parks and urban residential users can obtain green, low-carbon, and reliable centralized heat and power supply in the new era and under new circumstances. The unit also features high efficiency and flexibility, allowing it to serve as a supportive and regulating power source within new-type power systems, giving it a wide range of applications.
The construction and demonstration application of this system comprehensively breaks the traditional power system's reliance on conventional rotating machinery, fully validating the correctness of the fundamental theories, technological equipment, control strategies, and data transmission schemes for grid-forming energy storage technology in supporting the operation of wide-area large power grids. It effectively pioneers new application scenarios for grid-forming energy storage technology within new-type power systems, such as enhancing grid short-circuit capacity, improving system rotational inertia, optimizing frequency and voltage control, and providing fault ride-through support. It provides practical support for application scenarios including the development of new energy bases in "desert, Gobi, and barren land" areas, the operation of pure new energy grids in "high-altitude, border, coastal, and isolated" regions, the development and utilization of green power in enterprise parks, and ensuring power supply for end-grid loads. It serves as an important demonstration for increasing the proportion of clean energy consumption, exploring new development pathways for the renewable energy industry, and promoting diversified application scenarios for grid-forming energy storage, holding great significance for implementing the national "dual carbon" goals and advancing the construction of a new energy system.
This equipment integrates a controllable reactor with a transformer, enabling the controllable reactor to flexibly regulate the system's reactive power while simultaneously performing the voltage reduction function of a traditional transformer. Adopting an integrated three-phase, three-dimensional magnetic control transformer topology, it possesses excellent characteristics of voltage transformation, reactive power compensation, and dynamic voltage regulation. It can effectively address the challenges to reactive power balance and voltage stability in the power system posed by the integration of large-scale new energy sources. The 66kV magnetic control intelligent reactive power transformer can rapidly respond to reactive power variations from new energy generation, providing stable reactive power support for the grid integration of new energy, thereby promoting the absorption and utilization of new energy and driving the optimization and transformation of the energy structure.
This project addresses two key aspects—"energy storage scale configuration" and "digital equipment management"—to achieve intelligent and coordinated operation between high-proportion energy storage and wind-solar new energy. It realizes innovative applications of technology and equipment, ensures safe and reliable energy supply, accomplishes the goal of being "grid-friendly," promotes the development of the new "new energy + energy storage" model, and enhances the digital and intelligent level of the wind-solar-storage power station. Regarding "energy storage scale configuration," the project has constructed an energy storage system with a capacity equivalent to approximately 30% of the total installed wind and solar capacity, forming what is currently the world's largest integrated wind-solar-storage power station under construction in terms of storage capacity. Combined with the digital management of the wind-solar-storage system, it can provide reliable power support comparable to a approximately 600,000 kW thermal power unit for a duration of no less than 2 hours. In terms of "digital equipment management," the project carried out targeted technical research based on needs and innovatively developed a "Smart Joint Centralized Control System." This system primarily achieves digital management innovation through two approaches: "smart control" and "intelligent operation and maintenance" of the wind-solar-storage station cluster. This control system was selected for the 2021 National Catalogue of Major First-of-its-Kind Technical Equipment in the Energy Sector.
This equipment utilizes an automated control system for the working face machinery, achieving integrated control of the gangue-blocking support and the working face intelligent system, as well as the normalization of remote coal mining operations. This establishes a safety production model centered on "automatic coal cutting, supplemented by remote intervention." It integrates intelligent fully-mechanized mining technology for high-gas thin coal seams with the gob-side entry retaining technique. By employing a flexible-formwork concrete support process for gob-side entry retaining, it enhances the safety of production operations. Evaluated by industry associations, this technological achievement has reached an internationally advanced level. In practical application, the resource recovery rate has increased by 8.3%, the number of operational personnel has been reduced by two-thirds, direct economic benefits exceeding 60 million yuan have been achieved, and production efficiency and safety have been significantly improved.
Comments